This book is a kind of companion novel to the author's 'Patriots: a novel of the coming collapse'. Either can be read alone, but there is some overlap in terms of characters and events. As in 'Patriots', the story is fictional and set in a world where financial collapse has brought about the end of civilisation as we know it. There are no plagues, nuclear bombs or zombies, just the end of the modern way of life when the structure of society falls apart.
The story features several groups of people, mostly in the US. The exception is one of the main characters who is serving in the US army in Iraq at the time of collapse, and quite a lot of the book deals with his journey home by various means. These groups are mainly 'prepper' types to some extent who seem to have planned for such an emergency on some level.
This fictional story is used as a vehicle to instruct the reader on useful survival tips and to speculate about what sorts of issues would arise in that situation. This is all pretty interesting and why I bought the book mostly. However, the story is also used as a mechanism to preach and put forward the author's opinions on religion and the need to prepare for disasters. At some times this gets a bit much, but it isn't overpowering so I would recommend this book for anyone interested in survival/social collapse/apocalyptic fiction. It isn't pure entertainment like a story, but it doesn't read like a dry textbook either, so if this hybrid form sounds interesting then give it a go.
By the way, this book contains a lot of military jargon. If you're not that familiar with the terminology note that there's a glossary at THE BACK of the book. I found it once I had read the whole thing. Putting it at the front might have avoided some confusion!